doti3/bar/src/spotify.php

#!/usr/bin/php
<?php

require __DIR__.'/base/block.php';

$status = trim(shell_exec('playerctl -p spotify status'));

if (!in_array($status, ['Playing'])) {
    die;
}

function cleanUp($d, $max = 20)
{
    $string = trim(str_replace(['"', "'"], ' ', $d));

    if (mb_strlen($string) > $max) {
        $string = substr($string, 0, $max).'…';
    }

    return $string;
}

$title = cleanUp(shell_exec('playerctl -p spotify metadata xesam:title'));
$artist = cleanUp(shell_exec('playerctl -p spotify metadata xesam:artist'));

$label = sprintf('%s – %s', $title, $artist);
$fullText = sprintf('%s – %s', $title, $artist);

if (getenv('BLOCK_BUTTON') === '1') {
    shell_exec('i3-msg \'workspace "6. MEDIA"\'');
}

echo block(
    'spotify',
    [
        'full_text' => $fullText,
        'color' => color('music'),
    ]
);